Finishing tool



H"April 9, 1935. H. c. WARNR F1N1sH1NG TooL Filed Deo. s, 195o 2Sheets-Sheet l m 6) n/IVVENTOR April 9, 1935. H. C. wmmzr-z FINI SHINGTOOL Filed Dec. 8, 1930 2 Sheets-Sheet 2 INVENToR C Wan/bw i Mmmm;

Patented Apr. 9, l

,A uNlTEDgsTATEs PATENT oFFIonly, i

f F'I'NISHING rrooL vH'oineiHC. WarnerfCleveland; Ohio, assigner tio TheLees-Bradner Company, Cleveland, Ohio jat-corporation of )hio K' Vfo v vApplication Deoeibers, 1930,"sera1NoQ5o091 Y comme; (ci. 51e-A123) Thisinvention relates to apparatusv for `cutting formed on a shaft I'Ihaving a squared I l surfaces of'gear teeth andthe like, andjis particu#receive-a wrench, crank or handle by which the larly adapted for'use'ingthecutting of teeth' by angular position of thesupport may beadjustedt the-generating principle@ f Guides for waysy I8 areformed-'upon the upper 5 An objectofthe invention is to provide an im-Vsurface of the circular support and a `slide i9 5 proved machine bywhichtwo surfaces may `loe adjustably'carriedthereby. The slide i9. is pr.o.simultaneously generated with extreme accuracy. vided on its uppersurface with guides or Ways Another-object is topprovide'an improvedma-2S extendingin` a direction perpendicular to the chine which will besimplein;construction and guides I8 and mounted onv the last mentioned1p; operation. Another object; isk to provide an improved Means forOperatiiig 'CheiOOl Spindle Support mechanism inV which comparativelyfew parts consist of two handwheels 22 and 23 mounted on' must beformedwith extreme accuracy j horizontal. shafts 24 and 25 respectively.The- `Another object is to provide arr` improved inner ends of theseShafts are provided Ywith 1g mechanism in which adjustments can .bequickly 4bevelledpinions 26, that on shaft 24 meshing withv 15 andveasily effected. l 1 Y a bevelled pinion 2l supported in abearing 28Otherobjects will hereinafter appear.V z Celiiedby the base, en dthat onshaft 25-'Ir1eshineTV The invention will be betterunderstood from Withthe beVelled DiDiOIl 29 SimilarlysuDDOI'ied the description of `onepractical embodiment in bearing 30-V The PiniOIl 29iSsplined to a.hori-i 20 thereof illustrated in the accompanying-drawzontal shaft 3lwhich carries on its inner endia 20 ings, ,in which: g Y bevelledpinion-32. A sleeve 33 surroundsshaft v.Figure 1 fis a frontelevationgof thejmachine'. 3i and i0 'the SleeVe iS Spline@ pinion27,1116 embodying thoonvontiom 1 sleeve being supported in bearing 34',-andV assist- Figure 2 is` an endelevationof. the machine lng inSuDDOIiiIlg the Shaft 3|, the Sleeve-'termif 2 5 of Figure l taken fromthe left of .this figure; Dei/ing iii 2' beVelled PDOIl 35.'- l A 25 and1 A central vvertical shaft'36 terminates-in' a Figure 3 isaisimilarelevation'takenffrom the bel/Glied Pinion 37 meshing WithpiI1i0Ii`32rl` and right'of Figure l. l f y j is surrounded with asleeve 38 having Aat its lowerv V'Ihemachine comprises a bed or base Iupon end 2f bevelled pinion 39'I1eSl1iIig with DIIOIIJ,` Y 3o which thecutting mechanism.l illustrated as a the Shaft being iournalled in `thesleeve and the 30,

Y pair of grinding wheels,'and the Work supporting Sleeve; inl'iilin,being J'Ollrnalled in the Carriage S;

mechanism are. carried. `Upwardly extending Therupper end of sleeve-38-is provided with supports 2 and 3 arerigidly attached tothe bedbel/@lied Pinion 40 Which meshes With the geam and carry a horizontal ortopfsupportng momxed to a-screw 42,4 the screw being-threaded ber 4 onWhich the work holdingapparatus is i/-hlOilghaf depending bOSS 43 011.the Slide' |555 'SO 35 positioned" l Y, Y that, irrespective of theposition of the table,`r

, AThe Vortioal and horizontal Supports 2, 3 and 4 rotation ofhandwheel22 will `cause the lslide-to enclose a central spacev withinwhich the cutting be translated iilOIlgWaYS I8. o Y I' members,illustrated as a pair of grinding wheels A beVelled Pinion 44 iS SSCUI'GG0 the Lippe? 5 and', are positioned. Horizontal ways'l Vare end ofshaft 36 and meshes withr a bevelled pin- 40 formed on the upper Surface0f the bed OI 45 OI). a hOIZOl'ltalShaft 46 jOuInallSdln the the centralOpen Space, these VWays extending Circular table l5. 'The end 0f thl- SAShfl'ls pI'Of longitudinally' along. said Space, and upon these videdwith a gear: 4I meshing with a gear,4 `48, aremounted twoftablesorcarriages 8 which ,may Secured t0 a Shaft 49 i0 Which iSSDliiled aWOrm 45 be adjusted along said ways by screws 9 threaded 59- dlving 9Worm Wheel 5l' having a, tl'llead in 45 through depending bosses I0 Vonthe carriages, its interionby which itmay be causedto traveach screwbeing'provided with a worm wheel I I @TSB 3 SCT-@W 5z-SeCl11'ed t0 theSpindle SUDDOI 2|, with which meshes a, Worm l2 mounted on a, and sotraversethis support along guides ,211..j` horizontal .shaft I3andprovided at its outer end A Spindle 53 is journalled in the suppft'2l and with a handwheel I4. is provided on its inner endwith a grinding`Pivoted upon each table 8 to. be adjustable wheel having a flatoutwardly directed-grinding about a vertical axis isV a circular supportI5. face 54, With Which the cuttingof'ihe gear teeth Formed integrallywith the support is a dependiS effected. iThe Opposite end of `thefspindleis ing flange IIlprovided' Yon its outer periphery provided witha pulley 55 driven by a belt-55 by Y with worm wheel teeth which meshwith a worm power from a motorv5lthe motor driving apulways in a toolspindle supporting member 4:2LV rl0 rThework carrying portion ofthemechanism comprises guides 63 formed in the support 4 on which ismounted a slide 54 which may' be reciprocated by means-of a connectingrod |55 operated by a crank 66 driven by mechanism to be hereinafterdescribed.

Trunnioned on the slide is a work spindle sup,.- port 61 which isclamped intofposition as by bolts 68 and in which is journalled a workspindle 69.

to the lower end of whichfa work gear 1Q, may maybesecured. Y n

The upper' end of therwork spindle has con-. nected to it a spurpinion-1|, whichk meshes with the oblique teeth of a rack 12vadjustabl-y'carried infa holder 13which may be Sadjustably `securedupon the upper surface `of support 4.]

This'rack is formed of three parts, the central one of which, 12a, isrigidly connected tothe carrier, while the lower one of which', 12b, isvslidable and urged slightly outl ofelinement Vwith the stationaryportion by aspr-ing, Vfor theI purpose of preventingany looseness orbacklash between the pinion 1|A and thet'eeth of the stationary portion.The upper portion, 12e, of

` rack extends beyond the stationary an'dlower portions, "and maybemoved a distance equal to that between adjacent teethfor indexing the,Y work spindle. The meansfor operating thisindexingportion of therackwill belater described. The means for operatingV the workparryingmechanisrn'consists of a motor "13. mounted on the4 base I and driving,through a belt 14., a pulley 15 and the end ofaA transverse shaft. 16*jour-v nalledv on thev base, the oppositeend of whichshaft is providedwith a gear 11 driving a gear 18 secured to another transversehorizontal shaft 19; The. gears V'l1 andv 18 maybe changedto varythe'speeds at which vthe partsare driven.A

The shaft19 is provided atits .inner end' with a bevelled pinion .80-meshing withr a; bevelled pinion 8 on a vertical shaft 82 which,adjacent its upper end, is providedwithl a worm 8 3; driving a. wormwheel 8'4`attached toalhorizontal shaftV 85 having at'its outer end aslotted crank, disc 8,6 inthe slot ofwhich the crank lili is adjustablymounted. j

. The shaft 85 is also provided -witha disc81 having a pin 88;constitutingone element of a Geneva movement, the other element ofVwhich isl anotched disc 89A mounted on; a shaft 9.0i Drovided with agear 9| driving'a gea-r v 9:2'V upon a shaft93 with an intermittentmotion.

rIlhe shaft 93 carries a crankdisc 94. operating a connecting Yrod 95which oscillates an arm 9 6;Y

attached to shaft 91 provided at one end with a bevelled pinion98. This.pinion drives. a bevelled pinion 99. attached to a shaft llfsplined:upon. shaft |08 is a sleeve IUI journalled inv the rack carrier 13 .sothat it may be oscillated` at any position by-*the drive abovedescribed. sleeve is provided on one. endl with al bevelled; pinion |92meshing with a Vbevelled pinion m3 fixed' toa transverse shaft |94alsojournalled on. carrier 13. which meshes with a rack |66 cut in theupper edge of part 12o, (the indexing rackisothat the indexing rack isreciprocated backand forth by` the action ofthe Geneva movement. ThisThis Splined upon shaft |64 is a pinion reciprocation, of course, takesplace when the` work gear has rolled beyond the grinding Wheels andturns the same one or more teeth, allowing the master gear to roll backonto the fixed portion 12a of the rack before the teeth contact thegrinding wheels. r

By using a, rack having inclined teeth parallel to the axis of the workspindle, it is possible to use .a spur pinion at 1 While it would bepossible to use a pinion with helical teeth and a rack With'verticalteeth, this cannot be done until the machine has been used to rgeneratethe required master gear, as no prior type of machine is capable ofaccuratelyY generating tooth surfaces of helical gear. However, the spurgear above described may beaccurately made upon types of machinesalready known, and with a rack having inclined teeth, it is possible toobtain an accurate rollingmotion of the work spindle, and so hereafterwill be possible to produce accurateY helical master. gears.'

` While I have described the illustrated embodiment of `my invention insome particularity, obviously many others will readily occur to thoseskilled inthis art,.and I; therefore,A dol-not limit ymyself totheprecise details shown and described herein, but .claim as my inventionall embodiments, variations and modifications coming within the scopeofthe appended claims.

I claimz'V 1. A cutter supporting head for use on stationaryways orthelike consistingof a table slidable along said Ways, a carriagesupported.by said table. and. angularly adjustable about ani axis normal to saidwaysfaslide carried by said carriage and longitudinally movabletherealong, a

spindle .support mounted for longitudinali movement on-Lsaid: slide in adirection normal to the movementv of the slide upon the carriage,concentric shafts passing from the table to. the carriage through theaxis'about which. the? latter rotates, operatingv connections.associated with said shafts, and means'for controlling 'the movementsvof the slide and spindle support operated by said shafts.

2. A machine comprising a bed provided with guidewaysf, a tableslid'able onsaid ways, a carriage supported by said table and pivot'ed"about .an axis perpendicular to. said-ways, a tool spindie-.supported bysaid carriage and movable in a p la'ne normali to the axis of thecarriage in twol directions, two concentric shafts concentric with the?axisl of the carriage and' extending through .the same fand through thetable, means operated by one ofsaid shafts controlling the: movement ofthe spindle in one direction, means. operated by, theother of saidshaftscontrolling the movement ofthe. spindle in. the other direction,and means for` rotating said shafts carried by the bed. 3. A. machine.comprising 'a bed, guideways thereon, a table slidabley along said waysand having, aA carriage pivotally mounted thereon, a toolf spindlesupportedbytsaid carriage and movable in aplane normalI to the axisaboutwhich the carriagepivots in two mutually perpendicular directions,operating. means. for movingf said spindler includingv two.telescopically arranged' shafts concentric with said axis andhaving.operating meanscarried; by. Athe bed, anddriving connections for movingsaid spindle.

4f. A 'machine having a bed provided with gudeways, a. horizontalf tablemovable thereon, a carriage mounted; on said.y table and'` rotatableabolita-:verticali axis, a. slide upon said table-movable. horizontally:in` a. direction perpendicular to er upon said slideandmovablehorizontally in a direction perpendicular to the lastmentioned direction, means for moving said slide and spindle holdercomprising telescopically arranged shafts concentric with said axis,gears on the ends of said shafts, two horizontally arranged concentricshafts having vgears engaging said gears, handles carried by the framefor rotating said last mentioned shafts, a horizontalY slide, a Workspindle journalledtherein, and 10 means for rotating said work spindle.

HOMER C. WARNER.

